74HC4066D from Nexperia, in a SOIC-14. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	1Y	bidirectional	Analog switch 1 independent input or output terminal. Bidirectional analog I/O connected to 1Z through the analog switch when enable 1E is HIGH. Switch current limit ±25 mA.
2	1Z	bidirectional	Analog switch 1 independent input or output terminal. Bidirectional analog I/O connected to 1Y through the analog switch when enable 1E is HIGH.
3	2Z	bidirectional	Analog switch 2 independent input or output terminal. Bidirectional analog I/O connected to 2Y when 2E is HIGH.
4	2Y	bidirectional	Analog switch 2 independent input or output terminal. Bidirectional analog I/O connected to 2Z when 2E is HIGH.
5	2E	input	Enable input for switch 2 (active HIGH). H = switch ON, L = switch OFF. VIH ≥ 3.15 V at VCC = 4.5 V (CMOS levels for 74HC).
6	3E	input	Enable input for switch 3 (active HIGH). H = switch ON, L = switch OFF.
7	GND	power_in	Ground reference (0 V). Maximum ground current ±50 mA.
8	3Y	bidirectional	Analog switch 3 independent input or output terminal. Bidirectional analog I/O connected to 3Z when 3E is HIGH.
9	3Z	bidirectional	Analog switch 3 independent input or output terminal. Bidirectional analog I/O connected to 3Y when 3E is HIGH.
10	4Z	bidirectional	Analog switch 4 independent input or output terminal. Bidirectional analog I/O connected to 4Y when 4E is HIGH.
11	4Y	bidirectional	Analog switch 4 independent input or output terminal. Bidirectional analog I/O connected to 4Z when 4E is HIGH.
12	4E	input	Enable input for switch 4 (active HIGH). H = switch ON, L = switch OFF.
13	1E	input	Enable input for switch 1 (active HIGH). H = switch ON, L = switch OFF.
14	VCC	power_in	Positive supply voltage. Operating range 2.0 V to 10.0 V for 74HC4066; absolute max +11.0 V. ICC max 50 mA.

Key specifications

Parameter	Value
Manufacturer	Nexperia
Package	SOIC-14
Category	Interface
Pins	14

Ordering variants

74HC4066DD
74HC4066DPW
74HC4066DBQ

CAD (KiCad official)

Symbol: 74HC4066D
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOIC-14 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`74hc4066d.step`	195 KB	You want the bare part, or you mark your own boards.
`74hc4066d-etched.step`	2.2 MB	You want the part with `74HC4066D` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 551 faces against 237 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Nexperia datasheet (21 pp, sha256 3fca0cb9e46e306f, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF